Heartbleed Detector

You can't be too careful when it comes to Heartbleed. So to make sure all of your bases are covered, check out TrendMicro's Heartbleed detector, which checks your phone, its apps, and any cloud services they might use for Heartbleed vulnerabilities.

Available for: Android

Cost: Free

Average marketplace rating: 4.3 stars

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Wickr

Wickr is a secure messaging service that ensures privacy by using self-destructing messages. Users can decide who sees what and for how long, and each message is encrypted with its own unique key.

Available for: iOS and Android

Cost: Free

Average marketplace rating: 4.5 stars

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B-Secure Tracker

If you have lost your phone or if has been stolen, the B-Secure Tracker will help you track it down. After logging into a web portal, users can track the location of their missing phone on Google Maps and even remotely trigger the phone to take photos and voice recordings to help catch thieves.

Available for: Android

Cost: Free

Average marketplace rating: 3.6 stars

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AirWatch Secure Content Locker

The Secure Content Locker is an MCM app that gives users remote access to corporate resources. Employees are prompted for a Group ID, username and password, or authentication token before they are granted access. All documents are stored and protected by 256-bit AES encryption.

Available for: iOS and Android

Cost: Free

Average marketplace rating: 4 stars

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Bluebox Security Scanner

There are multiple "master key" security flaws that affect all Android devices, and the Bluebox Security Scanner checks to see if your device is vulnerable to any of them. It also checks to see if your device allows "Unknown Sources" application installs and whether or not installed applications are trying to exploit any master key vulnerabilities.

Available for: Android

Cost: Free

Average marketplace rating: 4.4 stars

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Best Phone Security Pro

It may look a little cheesy, but Best Phone Security Pro is, well, one of the best-rated security apps for the iPhone. Aside from a passcode or pattern lockscreen, in the event of a theft, the app can capture the thief's photo, track their location, and track the number of break-in attempts. It also has an alarm that can be set to go off if there are any unwanted attempts to access the device.

Available for: iOS

Cost: $0.99

Average marketplace rating: 4 stars

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Clueful Privacy Advisor

You never know who might be watching your mobile activity, so the Clueful Privacy Advisor gives users "privacy scores" to let them know how much their privacy is being compromised. The scores are tallied by scanning installed apps and determining how they use and/or abuse personal information.

Available for: Android

Cost: Free

Average marketplace rating: 4.2 stars

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RSA SecurID

Two-factor authentication is a great way to protect sensitive network data. RSA's SecurID app allows employees to use their mobile device as their authenticator by generating tokens for one-time use.

Available for: iOS and Android

Cost: Free

Average marketplace rating: 4 stars

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Mobile Security and Antivirus from Bitdefender

Bitdefender's mobile anti-virus suite isn't just an anti-virus scanner, it's more of an all-in-one package. Besides malware scans, other features include a privacy advisor, real-time web security for browsing, and anti-theft measures.

Available for: Android

Cost: Free

Average marketplace rating: 4.4 stars

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eWallet

Mobile devices often play host a slew of personal information. The eWallet keeps it all secure, locking down everything from bank and credit card information to passwords and PINs with 256-bit AES encryption.

Available for: iOS and Android

Cost: $9.99

Average marketplace rating: 4.5 stars

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Android Lost

For all of those times when you'll inevitably lose track of your phone, Android Lost lets you not only locate your device, but control it via web or SMS. Users can read messages, wipe their device, lock it, erase the SD card, set off an alarm, and more, all remotely.

Available for: Android

Cost: Free

Average marketplace rating: 4.3 stars

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SurfEasy VPN

SurfEasy offers Wi-Fi hotspot security, unblocks websites, and protects online privacy by encrypting all of the data that goes in and out of your device. The only caveat is that free users only get 500 MB of bandwidth per month; those seeking unlimited bandwidth need to pay extra.

SecureWeb Browser

The SecureWeb Browser allows users to securely access the internet in real time and syncs with Webroot's database of reputable URLs, allowing the app to flag malicious websites and warn users if they try to visit them.

Available for: Android

Cost: Free

Average marketplace rating: 4.3 stars

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AirWatch MDM Agent

Though not strictly a security application, AirWatch's MDM Agent allows businesses to enforce compliance and security policies to all deployed devices on their networks. It also provides secure mobile access to corporate resources and remote wipe/lock capabilities.

Available for: iOS and Android

Cost: Free

Average marketplace rating: 3.0 stars

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Mobile Security and Antivirus from ESET

One of the highest-rated security apps in the Google Play store, ESET's antivirus suite offers on-demand scans of both the hardware and apps, quarantine, and anti-theft measures. A premium version upgrade is also available.